Creo ModelCHECK > checks > EXTRA_LAYERS (Extra Layers)
  
EXTRA_LAYERS (Extra Layers)
Y/N/E/W
Lists any extra layers in the model. Extra layers are not listed in the start part.
If any are found, you can highlight the features in question in the Creo Parametric window.
If the ModelUPDATE mode is enabled, this check automatically deletes the extra layers.
Suggested Settings:
Inter
Batch
Regen
Save
W
W
W
W